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Chemical Sampling Information (CSI)
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General Description

Synonyms: 2,2- bis(p-Methoxyphenyl)-1,1,1-trichloroethane; Methoxychlor prior to 9/1/89

OSHA IMIS Code Number: 1646

Chemical Abstracts Service (CAS) Registry Number: 72-43-5

NIOSH Registry of Toxic Effects of Chemical Substances (RTECS) Identification Number: KJ3675000; 34075

Chemical Description and Physical Properties:

colorless to tan solid with a slight, fruity odor
molecular weight: 346
vapor pressure: Very low
boiling point: Decomposes
melting point: 94°C

Incompatibilities: Strong oxidizers

Exposure Limits

OSHA Permissible Exposure Limit (PEL):

General Industry: 15 mg/m3

Construction Industry: 15 mg/m3 TWA

American Conference of Governmental Industrial Hygienists (ACGIH) Threshold Limit Value (TLV): 10 mg/m3 TWA; Appendix A4 (Not Classifiable as a Human Carcinogen)

National Institute for Occupational Safety and Health (NIOSH) Recommended Exposure Limit (REL): Potential Carcinogen

Health Factors

Carcinogenic Classification:

International Agency for Research on Cancer (IARC): Group 3, not classifiable as to its carcinogenicity to humans

Potential Symptoms: None known in humans; In animals: fasiculation, trembling, convulsions; kidney, liver damage; (carcinogenic)

Health Effects: Cumulative kidney damage (HE3)

Affected Organs: None known

Monitoring Methods used by OSHA

Primary Laboratory Sampling/Analytical Method (SLC1):

  • sampling media: OSHA Versatile Sampler (OVS-2) - 13 mm XAD-2 tube (270/140 mg sections, 20/60 mesh) with Glass Fiber filter enclosed
    analytical solvent: Acetonitrile
    maximum volume: 60 Liters
    maximum flow rate: 1.0 L/min
    current analytical method: Gas Chromatography; GC/ECD
    method reference: 1,2 (OSHA In-house file)
    method classification: Partially Validated

Bulk Method:

  • Limit the amount of bulk submitted to one gram or one mL.

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